#ifndef __NET_FIB_RULES_H#define __NET_FIB_RULES_H #include <linux/types.h>#include <linux/slab.h>#include <linux/netdevice.h>#include <linux/fib_rules.h>#include <net/flow.h>#include <net/rtnetlink.h> struct fib_rule {	struct list_head	list;	int			iifindex;	int			oifindex;	u32			mark;	u32			mark_mask;	u32			flags;	u32			table;	u8			action;	/* 3 bytes hole, try to use */	u32			target;	struct fib_rule __rcu	*ctarget;	struct net		*fr_net; 	atomic_t		refcnt;	u32			pref;	int			suppress_ifgroup;	int			suppress_prefixlen;	char			iifname[IFNAMSIZ];	char			oifname[IFNAMSIZ];	struct rcu_head		rcu;}; struct fib_lookup_arg {	void			*lookup_ptr;	void			*result;	struct fib_rule		*rule;	int			flags;#define FIB_LOOKUP_NOREF	1}; struct fib_rules_ops {	int			family;	struct list_head	list;	int			rule_size;	int			addr_size;	int			unresolved_rules;	int			nr_goto_rules; 	int			(*action)(struct fib_rule *,					  struct flowi *, int,					  struct fib_lookup_arg *);	bool			(*suppress)(struct fib_rule *,					    struct fib_lookup_arg *);	int			(*match)(struct fib_rule *,					 struct flowi *, int);	int			(*configure)(struct fib_rule *,					     struct sk_buff *,					     struct fib_rule_hdr *,					     struct nlattr **);	void			(*delete)(struct fib_rule *);	int			(*compare)(struct fib_rule *,					   struct fib_rule_hdr *,					   struct nlattr **);	int			(*fill)(struct fib_rule *, struct sk_buff *,					struct fib_rule_hdr *);	u32			(*default_pref)(struct fib_rules_ops *ops);	size_t			(*nlmsg_payload)(struct fib_rule *); 	/* Called after modifications to the rules set, must flush	 * the route cache if one exists. */	void			(*flush_cache)(struct fib_rules_ops *ops); 	int			nlgroup;	const struct nla_policy	*policy;	struct list_head	rules_list;	struct module		*owner;	struct net		*fro_net;	struct rcu_head		rcu;}; #define FRA_GENERIC_POLICY \	[FRA_IIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \	[FRA_OIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \	[FRA_PRIORITY]	= { .type = NLA_U32 }, \	[FRA_FWMARK]	= { .type = NLA_U32 }, \	[FRA_FWMASK]	= { .type = NLA_U32 }, \	[FRA_TABLE]     = { .type = NLA_U32 }, \	[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \	[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \	[FRA_GOTO]	= { .type = NLA_U32 } static inline void fib_rule_get(struct fib_rule *rule){	atomic_inc(&rule->refcnt);} static inline void fib_rule_put_rcu(struct rcu_head *head){	struct fib_rule *rule = container_of(head, struct fib_rule, rcu);	release_net(rule->fr_net);	kfree(rule);} static inline void fib_rule_put(struct fib_rule *rule){	if (atomic_dec_and_test(&rule->refcnt))		call_rcu(&rule->rcu, fib_rule_put_rcu);} static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla){	if (nla[FRA_TABLE])		return nla_get_u32(nla[FRA_TABLE]);	return frh->table;} struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,					 struct net *);void fib_rules_unregister(struct fib_rules_ops *); int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,		     struct fib_lookup_arg *);int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,			 u32 flags);u32 fib_default_rule_pref(struct fib_rules_ops *ops);#endif